Sodium hydroxide (Sigma-Aldrich 415413, d=1.515 g/ml, 155 ml of a 50% solution, 2902.66 mmol) was added to N-[({2-chloro-6-[(3R)-3-methylmorpholin-4-yl]pyrimidin-4-yl}methyl)(methyl)oxido-λ6-(R)-sulfanylidene]-2,2,2-trifluoroacetamide (19.39 g, 48.38 mmol), 1,2-dibromoethane (16.68 mL, 193.51 mmol) and tetraoctylammonium bromide (2.65 g, 4.84 mmol) in methyl THF (1000 ml) at 20° C. under nitrogen. The resulting mixture was stirred at 20° C. for 24 hours. The reaction mixture was diluted with methyl THF (1000 ml) and the aqueous layer separated. The organic layer was diluted further with EtOAc (1000 ml) and then washed with water (1500 ml). The organic layer was dried over MgSO4, filtered and evaporated. The residue was purified by flash chromatography on silica, eluting with a gradient of 0 to 5% MeOH in DCM. Pure fractions were evaporated to dryness to afford (3R)-4-(2-chloro-6-(1-((R)—S-methylsulfonimidoyl)cyclopropyl)pyrimidin-4-yl)-3-methylmorpholine (6.88 g, 43%); 1H NMR (400 MHz, CDCl3) 1.32 (3H, d), 1.43 (2H, q), 1.72 (2H, q), 2.35 (1H, s), 3.09 (3H, s), 3.29 (1H, td), 3.53 (1H, td), 3.67 (1H, dd), 3.78 (1H, d), 4.00 (2H, dd), 4.32 (1H, s), 6.79 (1H, s); m/z: (ES+) MH+, 331.18 and 333.15. Example 2.02 can also be prepared as follows: 2M NaOH solution (14.86 ml, 29.72 mmol) was added to (3R)-3-methyl-4-(6-(1-((R)—S-methylsulfonimidoyl)cyclopropyl)-2-(1-tosyl-1H-pyrrolo[2,3-b]pyridin-4-yl)pyrimidin-4-yl)morpholine (8.42 g, 14.86 mmol) in DME:water 4:1 (134 ml). The resulting solution was stirred at RT for 4 days. In a separate experiment, 2M NaOH solution (7.06 ml, 14.12 mmol) was added to (3R)-3-methyl-4-(6-(1-((R)—S-methylsulfonimidoyl)cyclopropyl)-2-(1-tosyl-1H-pyrrolo[2,3-b]pyridin-4-yl)pyrimidin-4-yl)morpholine (4 g, 7.06 mmol) in DME:water 4:1 (63.5 ml). The resulting solution was stirred at RT for 18 hours. The reaction mixtures from the two procedures were combined and then neutralised with 2M HCl. The mixture was evaporated onto reverse phase silica gel (40 g) and the resulting powder was purified by flash chromatography on reverse phase silica, eluting with a gradient of 20 to 60% ACN in water with 1% ammonia. Pure fractions were evaporated to dryness to afford the title compound (7.05 g, 78%); 1H NMR (400 MHz, DMSO-d6) 1.27 (3H, t), 1.39-1.6 (3H, m), 1.7-1.8 (1H, m), 3.10 (3H, s), 3.26 (1H, d), 3.52 (1H, td), 3.67 (1H, dd), 3.80 (2H, t), 3.97-4.02 (1H, m), 4.19 (1H, d), 4.59 (1H, s), 7.00 (1H, s), 7.22 (1H, dd), 7.53-7.61 (1H, m), 7.95 (1H, d), 8.33 (1H, d), 11.75 (1H, s); m/z: (ES+) MH+, 413.08.
